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Preparation method and application of biochar for soil remediation

A soil remediation and biochar technology, which is applied in the field of biochar preparation for soil remediation, can solve the problems of long remediation period, low remediation performance, and large dosage, and achieve the advantages of short reaction time, improved remediation performance, and reduced dosage. Effect

Inactive Publication Date: 2021-04-27
昂骏环境科技(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a biochar preparation method and its application for soil remediation, to solve the problems of low yield, high bio-oil produced during decomposition, low remediation performance, and remediation problems. The problem of long cycle and large delivery volume

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  • Preparation method and application of biochar for soil remediation

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Effect test

Embodiment 1

[0023] The invention provides a technical solution: a method for preparing biochar for soil remediation, the preparation method comprising the following steps:

[0024] Step 1: After cleaning the biomass raw material, put it into a vacuum drying oven at 40°C for drying. The drying time is 30 minutes. Take out the dried biomass raw material and put it into a pulverizer for crushing and filtering to obtain biomass powder. ;

[0025] Step 2: Put the biomass powder obtained in step 1 into the carbonization furnace, pass protective gas into the carbonization furnace, heat the carbonization furnace with an external heating method, and control the temperature rise of the carbonization furnace at 7 / s The speed is raised to 400°C. When the temperature of the carbonization furnace reaches 400°C, the biomass powder in the carbonization furnace is heated by internal heating, and the heating temperature is controlled at 500°C. The reaction time is 5 hours. After the reaction is completed, ...

Embodiment 2

[0037] A method for preparing biochar for soil restoration, the preparation method comprising the following steps:

[0038] Step 1: After cleaning the biomass raw material, put it into a vacuum drying oven at 40°C for drying. The drying time is 60 minutes. Take out the dried biomass raw material and put it into a pulverizer for pulverization and filtration to obtain biomass powder ;

[0039] Step 2: Put the biomass powder obtained in step 1 into the carbonization furnace, pass protective gas into the carbonization furnace, heat the carbonization furnace with an external heating method, and control the temperature rise of the carbonization furnace at 5 / s The speed is raised to 400°C. When the temperature of the carbonization furnace reaches 400°C, the biomass powder in the carbonization furnace is heated by internal heating, and the heating temperature is controlled at 800°C. The reaction time is 3 hours. After the reaction is completed, cool to Obtain biochar material at room...

Embodiment 3

[0051] A method for preparing biochar for soil restoration, the preparation method comprising the following steps:

[0052] Step 1: After cleaning the biomass raw material, put it into a vacuum drying oven at 40°C for drying. The drying time is 60 minutes. Take out the dried biomass raw material and put it into a pulverizer for pulverization and filtration to obtain biomass powder ;

[0053] Step 2: Put the biomass powder obtained in step 1 into the carbonization furnace, pass protective gas into the carbonization furnace, heat the carbonization furnace with an external heating method, and control the temperature rise of the carbonization furnace at 5 / s The speed is raised to 400°C. When the temperature of the carbonization furnace reaches 400°C, the biomass powder in the carbonization furnace is heated by internal heating, and the heating temperature is controlled at 1000°C. The reaction time is 3 hours. After the reaction is completed, cool to Obtain biochar material at roo...

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Abstract

The invention belongs to the technical field of biochar preparation and application, and particularly relates to a preparation method and application of biochar for soil remediation. Biomass powder is heated twice. The biomass powder can be preheated through primary heating, the yield of biochar can be increased through a slow heating mode, and meanwhile, the yield of gas is reduced. A microwave thermal cracking method is adopted for secondary heating, it can be guaranteed that the biomass powder is heated in an internal and external balanced mode in the reaction process, the heating time is shortened, materials are not limited, secondary heating reaction can be carried out on components in the biomass powder after primary heating is completed, and the yield of the biochar after primary heating is improved again. The reaction time is short, the reaction temperature is divided into two stages, namely slow heating and rapid constant-temperature heating, the yield of the biochar is increased, and the processing cost is reduced. Animal waste and an oxidizing agent are added on the basis of the biochar material, so that the efficacy of the biochar agent is improved.

Description

technical field [0001] The invention relates to the technical field of biochar preparation and application, in particular to a method for preparing biochar for soil restoration and its application. Background technique [0002] Biochar is an insoluble, stable, highly aromatized, and carbon-rich solid substance formed by pyrolysis and dry distillation of biomass under anoxic and high temperature conditions. It has large porosity and specific surface area, and a large amount of Negative charge and high charge density, and rich in oxygen, nitrogen, and sulfur-containing energy groups, with a large cation exchange capacity and strong adsorption, oxidation resistance and anti-biodegradation ability, biochar The rich pore structure in the biochar can be used as the carrier of microorganisms and their effective nutrients, and can promote the growth of microbial communities in the soil. Most of the existing methods for preparing biochar are obtained by pyrolysis, but the yield of th...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/80C01B32/05
CPCC05G3/00C05G3/80C01B32/05
Inventor 吴可钦苗涛付建芳
Owner 昂骏环境科技(上海)有限公司
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